Liquid slurry containing polyhedral monocrystalline alumina
US6126515A · kind A · utility
6Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1999 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Dec 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/82
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A liquid slurry containing spherical abrading particles of polyhedral monocrystalline alumina is supplied onto the target surface of a magnetic hard disk substrate to be textured while a polishing tape is pressed onto the target surface and the disk substrate is concurrently rotated. Because the contacting surfaces of these particles are spherical and have no sharp edges, they do not scratch the target surface or create grooves which are undesirably too deep.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.